A simple electric switch can now flip a layer of ice between a messy state and a perfect hexagonal crystal at the level of a single atom.
April 29, 2026
Original Paper
Electric-field control of hydrogen bonding via interfacial charge at atomic resolution
arXiv · 2604.25114
The Takeaway
Hydrogen bonds are the essential glue that holds water and the DNA in our bodies together. Researchers used an external electric field to precisely control these bonds on a graphite surface, allowing them to program the structure of water at will. This level of control was previously thought to be impossible due to the chaotic nature of hydrogen bonding. Being able to turn these bonds on and off opens the door to molecular scale electronics where water itself acts as a circuit. It means we could eventually build computers that are smaller, faster, and more efficient by mimicking the basic chemistry of life. This technology brings us closer to a future where we can program matter itself.
From the abstract
Hydrogen-bond networks govern molecular structure and function across chemistry, biology and materials science, yet their deterministic control at the atomic scale remains a central challenge (1-9).Here, we directly visualize how an external electric field enables reversible control of a hydrogen-bond network in monolayer ice on graphite through interfacial charge redistribution. Low-temperature scanning tunnelling microscopy reveals a field-driven transition from a mobile, physisorbed, non-wett